Van der Sloot is in custody in Peru because he is suspected of killing a 21-year-old woman last month in a Lima hotel.

Van der Sloot has been the main suspect in Holloway's disappearance from Aruba five years ago. The Mountain Brook teen was on a class trip.

Van der Sloot, a citizen of the Netherlands who lives a lot of the time on Aruba, has been arrested twice but released each time in connection with Holloway's disappearance. Her body has never been found, despite extensive searches.

Her death came five years to the day that Natalee Holloway disappeared.

Federal authorities in Alabama also allege that van der Sloot tried to extort $250,000 from Natalee Holloway's mother, Beth Holloway, in exchange for revealing the location of her body and how she died.

Van der Sloot admitted lying about the location of Natalee Holloway's body as part of that extortion scheme, according to an FBI affidavit unsealed Thursday.